Generally, a download manager enables downloading of large files or multiples files in one session.Many web browsers, such as Internet Explorer 9, include a download manager.Stand-alone download managers also are available, including the Microsoft Download Manager.

if you do not have a download manager installed, and still want to download the file(s) you've chosen, please note:

You may not be able to download multiple files at the same time.In this case, you will have to download the files individually.(You would have the opportunity to download individual files on the "Thank you for downloading" page after completing your download.)

Files larger than 1 GB may take much longer to download and might not download correctly.

You might not be able to pause the active downloads or resume downloads that have failed.

The Microsoft Download Manager solves these potential problems.It gives you the ability to download multiple files at one time and download large files quickly and reliably.It also allows you to suspend active downloads and resume downloads that have failed.

If a pre-release version of the Windows Phone SDK 7.1 (Beta or RC) is installed on the machine, please uninstall it before installing this product.
Click on the vm_web2.exe file in the download section above. This will start the installation of Windows Phone SDK 7.1 and install necessary components on your computer.
Please refer to the Release Notes in the download section above for additional details before running setup.
Note: this release is also available in .iso format.
Choose one of the following options for handling downloaded ISO images:

(Recommended) Write the image file to a blank DVD.

(Alternative) Mount the image file virtually as DVD devices.

For more information about these options, see "What are ISO image files and how do I use them?" on the FAQ page.

The Windows Phone 8.1 Update Emulators package adds additional emulator images to an existing installation of Visual Studio 2013 Update 2 or later. With this update installed, you can create and test apps that will run on devices that have Windows Phone 8.1 Update.